Title:
UPWARD FEED DEVICE FOR SEWING MACHINE
Document Type and Number:
Japanese Patent JPS5535690
Kind Code:
A
Abstract:
A top feeding device for advancing the upper layer of material in synchronism with the lower layer of material being sewn. The top feeding device includes an upper feed dog moving periodically in conjunction with a lower feed dog to grip and advance the materials being sewn along a path related to the stroke of the stitching needle or needles of the sewing machine. Drive for the top feeder is derived from an eccentric cam mounted on the sewing machine main drive shaft, motion being positively transferred to a pivotal upper feed dog arm by means of a lever arm depending from that arm and being a cam-following surface held under adjustable pressure in contact with the eccentric cam. The pivot for the upper feed dog arm is disposed upon an extension of the main lower feed bar which thereby provides horizontal motion to both the upper and lower feed dog arms.
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Inventors:
ROBAATO II POOTAA
Application Number:
JP10287779A
Publication Date:
March 12, 1980
Filing Date:
August 14, 1979
Export Citation:
Assignee:
PORTER ROBERT E
International Classes:
D05B27/06; D05B27/04; D05B85/06; (IPC1-7): D05B27/06
Domestic Patent References:
| JPH079064U | 1995-02-07 |
Foreign References:
| US3530809A | 1970-09-29 | |||
| US2549057A | 1951-04-17 |